592 lines
15 KiB
Haxe
592 lines
15 KiB
Haxe
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/*
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* Copyright (C)2005-2019 Haxe Foundation
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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* DEALINGS IN THE SOFTWARE.
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*/
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package haxe;
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import haxe.ds.List;
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/**
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The Serializer class can be used to encode values and objects into a `String`,
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from which the `Unserializer` class can recreate the original representation.
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This class can be used in two ways:
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- create a `new Serializer()` instance, call its `serialize()` method with
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any argument and finally retrieve the String representation from
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`toString()`
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- call `Serializer.run()` to obtain the serialized representation of a
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single argument
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Serialization is guaranteed to work for all haxe-defined classes, but may
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or may not work for instances of external/native classes.
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The specification of the serialization format can be found here:
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<https://haxe.org/manual/std-serialization-format.html>
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**/
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class Serializer {
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/**
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If the values you are serializing can contain circular references or
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objects repetitions, you should set `USE_CACHE` to true to prevent
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infinite loops.
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This may also reduce the size of serialization Strings at the expense of
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performance.
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This value can be changed for individual instances of `Serializer` by
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setting their `useCache` field.
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**/
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public static var USE_CACHE = false;
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/**
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Use constructor indexes for enums instead of names.
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This may reduce the size of serialization Strings, but makes them less
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suited for long-term storage: If constructors are removed or added from
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the enum, the indices may no longer match.
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This value can be changed for individual instances of `Serializer` by
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setting their `useEnumIndex` field.
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**/
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public static var USE_ENUM_INDEX = false;
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static var BASE64 = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789%:";
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static var BASE64_CODES = null;
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var buf:StringBuf;
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var cache:Array<Dynamic>;
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var shash:haxe.ds.StringMap<Int>;
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var scount:Int;
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/**
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The individual cache setting for `this` Serializer instance.
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See `USE_CACHE` for a complete description.
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**/
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public var useCache:Bool;
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/**
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The individual enum index setting for `this` Serializer instance.
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See `USE_ENUM_INDEX` for a complete description.
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**/
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public var useEnumIndex:Bool;
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/**
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Creates a new Serializer instance.
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Subsequent calls to `this.serialize` will append values to the
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internal buffer of this String. Once complete, the contents can be
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retrieved through a call to `this.toString`.
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Each `Serializer` instance maintains its own cache if `this.useCache` is
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`true`.
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**/
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public function new() {
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buf = new StringBuf();
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cache = new Array();
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useCache = USE_CACHE;
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useEnumIndex = USE_ENUM_INDEX;
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shash = new haxe.ds.StringMap();
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scount = 0;
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}
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/**
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Return the String representation of `this` Serializer.
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The exact format specification can be found here:
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https://haxe.org/manual/serialization/format
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**/
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public function toString() {
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return buf.toString();
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}
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/* prefixes :
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a : array
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b : hash
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c : class
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d : Float
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e : reserved (float exp)
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f : false
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g : object end
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h : array/list/hash end
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i : Int
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j : enum (by index)
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k : NaN
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l : list
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m : -Inf
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n : null
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o : object
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p : +Inf
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q : haxe.ds.IntMap
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r : reference
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s : bytes (base64)
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t : true
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u : array nulls
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v : date
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w : enum
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x : exception
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y : urlencoded string
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z : zero
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A : Class<Dynamic>
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B : Enum<Dynamic>
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M : haxe.ds.ObjectMap
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C : custom
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*/
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function serializeString(s:String) {
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var x = shash.get(s);
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if (x != null) {
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buf.add("R");
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buf.add(x);
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return;
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}
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shash.set(s, scount++);
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#if old_serialize
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// no more support for -D old_serialize due to 'j' reuse
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#if error
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#end
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#end
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buf.add("y");
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s = StringTools.urlEncode(s);
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buf.add(s.length);
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buf.add(":");
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buf.add(s);
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}
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function serializeRef(v:Dynamic) {
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#if js
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var vt = js.Syntax.typeof(v);
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#end
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for (i in 0...cache.length) {
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#if js
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var ci = cache[i];
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if (js.Syntax.typeof(ci) == vt && ci == v) {
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#else
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if (cache[i] == v) {
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#end
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buf.add("r");
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buf.add(i);
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return true;
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}
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}
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cache.push(v);
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return false;
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}
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#if flash
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// only the instance variables
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function serializeClassFields(v:Dynamic, c:Dynamic) {
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var xml:flash.xml.XML = untyped __global__["flash.utils.describeType"](c);
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var vars = xml.factory[0].child("variable");
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for (i in 0...vars.length()) {
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var f = vars[i].attribute("name").toString();
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if (!v.hasOwnProperty(f))
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continue;
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serializeString(f);
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serialize(Reflect.field(v, f));
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}
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buf.add("g");
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}
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#end
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function serializeFields(v:{}) {
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for (f in Reflect.fields(v)) {
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serializeString(f);
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serialize(Reflect.field(v, f));
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}
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buf.add("g");
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}
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/**
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Serializes `v`.
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All haxe-defined values and objects with the exception of functions can
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be serialized. Serialization of external/native objects is not
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guaranteed to work.
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The values of `this.useCache` and `this.useEnumIndex` may affect
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serialization output.
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**/
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public function serialize(v:Dynamic) {
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switch (Type.typeof(v)) {
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case TNull:
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buf.add("n");
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case TInt:
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var v:Int = v;
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if (v == 0) {
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buf.add("z");
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return;
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}
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buf.add("i");
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buf.add(v);
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case TFloat:
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var v:Float = v;
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if (Math.isNaN(v))
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buf.add("k");
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else if (!Math.isFinite(v))
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buf.add(if (v < 0) "m" else "p");
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else {
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buf.add("d");
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buf.add(v);
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}
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case TBool:
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buf.add(if (v) "t" else "f");
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case TClass(c):
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if (#if neko untyped c.__is_String #else c == String #end) {
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serializeString(v);
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return;
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}
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if (useCache && serializeRef(v))
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return;
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switch (#if (neko || cs || python) Type.getClassName(c) #else c #end) {
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case #if (neko || cs || python) "Array" #else cast Array #end:
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var ucount = 0;
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buf.add("a");
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#if (flash || python || hl)
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var v:Array<Dynamic> = v;
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#end
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var l = #if (neko || flash || php || cs || java || python || hl || lua || eval) v.length #elseif cpp v.__length() #else __getField(v,
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"length") #end;
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for (i in 0...l) {
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if (v[i] == null)
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ucount++;
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else {
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if (ucount > 0) {
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if (ucount == 1)
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buf.add("n");
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else {
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buf.add("u");
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buf.add(ucount);
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}
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ucount = 0;
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}
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serialize(v[i]);
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}
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}
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if (ucount > 0) {
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if (ucount == 1)
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buf.add("n");
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else {
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buf.add("u");
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buf.add(ucount);
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}
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}
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buf.add("h");
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case #if (neko || cs || python) "haxe.ds.List" #else cast List #end:
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buf.add("l");
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var v:List<Dynamic> = v;
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for (i in v)
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serialize(i);
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buf.add("h");
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case #if (neko || cs || python) "Date" #else cast Date #end:
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var d:Date = v;
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buf.add("v");
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buf.add(d.getTime());
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case #if (neko || cs || python) "haxe.ds.StringMap" #else cast haxe.ds.StringMap #end:
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buf.add("b");
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var v:haxe.ds.StringMap<Dynamic> = v;
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for (k in v.keys()) {
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serializeString(k);
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serialize(v.get(k));
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}
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buf.add("h");
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case #if (neko || cs || python) "haxe.ds.IntMap" #else cast haxe.ds.IntMap #end:
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buf.add("q");
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var v:haxe.ds.IntMap<Dynamic> = v;
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for (k in v.keys()) {
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buf.add(":");
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buf.add(k);
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serialize(v.get(k));
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}
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buf.add("h");
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case #if (neko || cs || python) "haxe.ds.ObjectMap" #else cast haxe.ds.ObjectMap #end:
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buf.add("M");
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var v:haxe.ds.ObjectMap<Dynamic, Dynamic> = v;
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for (k in v.keys()) {
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#if (js || neko)
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var id = Reflect.field(k, "__id__");
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Reflect.deleteField(k, "__id__");
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serialize(k);
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Reflect.setField(k, "__id__", id);
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#else
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serialize(k);
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#end
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serialize(v.get(k));
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}
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buf.add("h");
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case #if (neko || cs || python) "haxe.io.Bytes" #else cast haxe.io.Bytes #end:
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var v:haxe.io.Bytes = v;
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#if neko
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var chars = new String(base_encode(v.getData(), untyped BASE64.__s));
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buf.add("s");
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buf.add(chars.length);
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buf.add(":");
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buf.add(chars);
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#elseif php
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var chars = new String(php.Global.base64_encode(v.getData()));
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chars = php.Global.strtr(chars, '+/', '%:');
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buf.add("s");
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buf.add(chars.length);
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buf.add(":");
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buf.add(chars);
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#else
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buf.add("s");
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buf.add(Math.ceil((v.length * 8) / 6));
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buf.add(":");
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var i = 0;
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var max = v.length - 2;
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var b64 = BASE64_CODES;
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if (b64 == null) {
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b64 = new haxe.ds.Vector(BASE64.length);
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for (i in 0...BASE64.length)
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b64[i] = BASE64.charCodeAt(i);
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BASE64_CODES = b64;
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}
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while (i < max) {
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var b1 = v.get(i++);
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var b2 = v.get(i++);
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var b3 = v.get(i++);
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buf.addChar(b64[b1 >> 2]);
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buf.addChar(b64[((b1 << 4) | (b2 >> 4)) & 63]);
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buf.addChar(b64[((b2 << 2) | (b3 >> 6)) & 63]);
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buf.addChar(b64[b3 & 63]);
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}
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if (i == max) {
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var b1 = v.get(i++);
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var b2 = v.get(i++);
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buf.addChar(b64[b1 >> 2]);
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buf.addChar(b64[((b1 << 4) | (b2 >> 4)) & 63]);
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buf.addChar(b64[(b2 << 2) & 63]);
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} else if (i == max + 1) {
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var b1 = v.get(i++);
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|
|
buf.addChar(b64[b1 >> 2]);
|
||
|
|
buf.addChar(b64[(b1 << 4) & 63]);
|
||
|
|
}
|
||
|
|
#end
|
||
|
|
default:
|
||
|
|
if (useCache) cache.pop();
|
||
|
|
if (#if flash try
|
||
|
|
v.hxSerialize != null
|
||
|
|
catch (e:Dynamic)
|
||
|
|
false #elseif (cs || java || python) Reflect.hasField(v,
|
||
|
|
"hxSerialize") #elseif php php.Global.method_exists(v, 'hxSerialize') #else v.hxSerialize != null #end) {
|
||
|
|
buf.add("C");
|
||
|
|
serializeString(Type.getClassName(c));
|
||
|
|
if (useCache)
|
||
|
|
cache.push(v);
|
||
|
|
v.hxSerialize(this);
|
||
|
|
buf.add("g");
|
||
|
|
} else {
|
||
|
|
buf.add("c");
|
||
|
|
serializeString(Type.getClassName(c));
|
||
|
|
if (useCache)
|
||
|
|
cache.push(v);
|
||
|
|
#if flash
|
||
|
|
serializeClassFields(v, c);
|
||
|
|
#else
|
||
|
|
serializeFields(v);
|
||
|
|
#end
|
||
|
|
}
|
||
|
|
}
|
||
|
|
case TObject:
|
||
|
|
if (Std.isOfType(v, Class)) {
|
||
|
|
var className = Type.getClassName(v);
|
||
|
|
#if (flash || cpp)
|
||
|
|
// Currently, Enum and Class are the same for flash and cpp.
|
||
|
|
// use resolveEnum to test if it is actually an enum
|
||
|
|
if (Type.resolveEnum(className) != null)
|
||
|
|
buf.add("B")
|
||
|
|
else
|
||
|
|
#end
|
||
|
|
buf.add("A");
|
||
|
|
serializeString(className);
|
||
|
|
} else if (Std.isOfType(v, Enum)) {
|
||
|
|
buf.add("B");
|
||
|
|
serializeString(Type.getEnumName(v));
|
||
|
|
} else {
|
||
|
|
if (useCache && serializeRef(v))
|
||
|
|
return;
|
||
|
|
buf.add("o");
|
||
|
|
serializeFields(v);
|
||
|
|
}
|
||
|
|
case TEnum(e):
|
||
|
|
if (useCache) {
|
||
|
|
if (serializeRef(v))
|
||
|
|
return;
|
||
|
|
cache.pop();
|
||
|
|
}
|
||
|
|
buf.add(useEnumIndex ? "j" : "w");
|
||
|
|
serializeString(Type.getEnumName(e));
|
||
|
|
#if neko
|
||
|
|
if (useEnumIndex) {
|
||
|
|
buf.add(":");
|
||
|
|
buf.add(v.index);
|
||
|
|
} else
|
||
|
|
serializeString(new String(v.tag));
|
||
|
|
buf.add(":");
|
||
|
|
if (v.args == null)
|
||
|
|
buf.add(0);
|
||
|
|
else {
|
||
|
|
var l:Int = untyped __dollar__asize(v.args);
|
||
|
|
buf.add(l);
|
||
|
|
for (i in 0...l)
|
||
|
|
serialize(v.args[i]);
|
||
|
|
}
|
||
|
|
#elseif flash
|
||
|
|
if (useEnumIndex) {
|
||
|
|
buf.add(":");
|
||
|
|
var i:Int = v.index;
|
||
|
|
buf.add(i);
|
||
|
|
} else
|
||
|
|
serializeString(v.tag);
|
||
|
|
buf.add(":");
|
||
|
|
var pl:Array<Dynamic> = v.params;
|
||
|
|
if (pl == null)
|
||
|
|
buf.add(0);
|
||
|
|
else {
|
||
|
|
buf.add(pl.length);
|
||
|
|
for (p in pl)
|
||
|
|
serialize(p);
|
||
|
|
}
|
||
|
|
#elseif cpp
|
||
|
|
var enumBase:cpp.EnumBase = v;
|
||
|
|
if (useEnumIndex) {
|
||
|
|
buf.add(":");
|
||
|
|
buf.add(enumBase.getIndex());
|
||
|
|
} else
|
||
|
|
serializeString(enumBase.getTag());
|
||
|
|
buf.add(":");
|
||
|
|
var len = enumBase.getParamCount();
|
||
|
|
buf.add(len);
|
||
|
|
for (p in 0...len)
|
||
|
|
serialize(enumBase.getParamI(p));
|
||
|
|
#elseif php
|
||
|
|
if (useEnumIndex) {
|
||
|
|
buf.add(":");
|
||
|
|
buf.add(v.index);
|
||
|
|
} else
|
||
|
|
serializeString(v.tag);
|
||
|
|
buf.add(":");
|
||
|
|
var l:Int = php.Syntax.code("count({0})", v.params);
|
||
|
|
if (l == 0 || v.params == null)
|
||
|
|
buf.add(0);
|
||
|
|
else {
|
||
|
|
buf.add(l);
|
||
|
|
for (i in 0...l) {
|
||
|
|
#if php
|
||
|
|
serialize(v.params[i]);
|
||
|
|
#end
|
||
|
|
}
|
||
|
|
}
|
||
|
|
#elseif (java || cs || python || hl || eval)
|
||
|
|
if (useEnumIndex) {
|
||
|
|
buf.add(":");
|
||
|
|
buf.add(Type.enumIndex(v));
|
||
|
|
} else
|
||
|
|
serializeString(Type.enumConstructor(v));
|
||
|
|
buf.add(":");
|
||
|
|
var arr:Array<Dynamic> = Type.enumParameters(v);
|
||
|
|
if (arr != null) {
|
||
|
|
buf.add(arr.length);
|
||
|
|
for (v in arr)
|
||
|
|
serialize(v);
|
||
|
|
} else {
|
||
|
|
buf.add("0");
|
||
|
|
}
|
||
|
|
#elseif (js && !js_enums_as_arrays)
|
||
|
|
if (useEnumIndex) {
|
||
|
|
buf.add(":");
|
||
|
|
buf.add(v._hx_index);
|
||
|
|
} else
|
||
|
|
serializeString(Type.enumConstructor(v));
|
||
|
|
buf.add(":");
|
||
|
|
var params = Type.enumParameters(v);
|
||
|
|
buf.add(params.length);
|
||
|
|
for (p in params)
|
||
|
|
serialize(p);
|
||
|
|
#else
|
||
|
|
if (useEnumIndex) {
|
||
|
|
buf.add(":");
|
||
|
|
buf.add(v[1]);
|
||
|
|
} else
|
||
|
|
serializeString(v[0]);
|
||
|
|
buf.add(":");
|
||
|
|
var l = __getField(v, "length");
|
||
|
|
buf.add(l - 2);
|
||
|
|
for (i in 2...l)
|
||
|
|
serialize(v[i]);
|
||
|
|
#end
|
||
|
|
if (useCache)
|
||
|
|
cache.push(v);
|
||
|
|
case TFunction:
|
||
|
|
throw "Cannot serialize function";
|
||
|
|
default:
|
||
|
|
#if neko
|
||
|
|
if (untyped (__i32__kind != null && __dollar__iskind(v, __i32__kind))) {
|
||
|
|
buf.add("i");
|
||
|
|
buf.add(v);
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
#end
|
||
|
|
throw "Cannot serialize " + Std.string(v);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
extern inline function __getField(o:Dynamic, f:String):Dynamic
|
||
|
|
return o[cast f];
|
||
|
|
|
||
|
|
public function serializeException(e:Dynamic) {
|
||
|
|
buf.add("x");
|
||
|
|
#if flash
|
||
|
|
if (untyped __is__(e, __global__["Error"])) {
|
||
|
|
var e:flash.errors.Error = e;
|
||
|
|
var s = e.getStackTrace();
|
||
|
|
if (s == null)
|
||
|
|
serialize(e.message);
|
||
|
|
else
|
||
|
|
serialize(s);
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
#end
|
||
|
|
serialize(e);
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
Serializes `v` and returns the String representation.
|
||
|
|
|
||
|
|
This is a convenience function for creating a new instance of
|
||
|
|
Serializer, serialize `v` into it and obtain the result through a call
|
||
|
|
to `toString()`.
|
||
|
|
**/
|
||
|
|
public static function run(v:Dynamic) {
|
||
|
|
var s = new Serializer();
|
||
|
|
s.serialize(v);
|
||
|
|
return s.toString();
|
||
|
|
}
|
||
|
|
|
||
|
|
#if neko
|
||
|
|
static var base_encode = neko.Lib.load("std", "base_encode", 2);
|
||
|
|
#end
|
||
|
|
}
|